<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        let data=prompt('今天星期几？请用英语表达')
        switch(data){
            case "星期一":alert('Monday')
            break;
            case "星期二":alert('Tuesday')
            break;
            case "星期三":alert('Wednesday')
            break;
            case "星期四":alert('Thursday')
            break;
            case "星期五":alert('Friday')
            break;
            case "星期六":alert('Saturday')
            break;
            case "星期日":alert('Sunday')
            break;
            default:alert('输入有误')

        }
    </script>
</body>
</html>